Applied Acoustics Course - A.Y. 2018/2019
Calendar with link to PPT presentations, AVI audio-video recordings,
notes |
The final results of in-class tests have been released !!! |
N. |
Date |
Time |
Topic |
Teacher |
Presentation |
Recording |
Note |
|
28/09/2018 |
14.30-16.00 |
Visit to Casa del Suono |
Michele |
|
|
|
0 |
05/10/2018 |
13.45-14.40 |
Course introduction |
Pinardi |
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1 |
14.50-15.35 |
Nature of sound, fundamental physical quantities |
Daniel Pinardi |
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2 |
15.45-16.40 |
Energy & Sound, scale of decibels |
Daniel Pinardi |
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|
12/10/2018 |
13.45-14.40 |
Human auditory system, loudness evaluation, weighting curves |
Angelo Farina |
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4 |
14.50-15.35 |
The Sound Level Meter, equivalent level, calibration, time history with different time constants (slow, fast, etc.) |
Angelo Farina | ||||
5 |
15.45-16.40 |
Sum and subtraction of values in dB, examples of dB summation, Spectral Analysis, FFT, octave bands, Bark bands |
Angelo Farina | ||||
6 |
19/10/2018 |
13.45-14.40 |
Free Field sound propagation, point sources, spherical divergence, directivity |
Angelo Farina | |||
7 |
14.50-15.35 |
Linear sources, cylindrical divergence, excess attenuation |
Angelo Farina | ||||
8 |
15.45-16.40 |
Noise screens, Maekawa formulas, examples |
Angelo Farina | ||||
9 |
26/10/2018 |
13.45-14.40 |
Indoor sound propagation, semi-reverberant field, critical distance |
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10 |
14.50-15.35 |
Reverberation time, definition and Sabine's formula |
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11 |
15.45-16.40 |
Environmental correction factor K2, sound propagation inside not-Sabinian rooms. |
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12 |
16:40-17:30 |
Digital sampling of sound, digital filters, FFT, convolution in time and frequency domain |
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13 |
09/11/2018 |
13.45-14.35 |
Measurement of impulse response: impulsive sources, microphones |
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14 |
14.45-15.30 |
Measurement of impulse response: loudspeakers, MLS and ESS methods |
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|
15.40-16.30 |
Practical experiments of IR measurements (*) |
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16:30-17:30 |
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15 |
16/11/2018 |
13.45-14.40 |
ISO3382 standard, acoustical parameters: T20, T30, EDT, Clarity, Definition, Center Time, IACC, Jlf, G |
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16 |
14.50-15.35 |
Speech Transmission Index: measurement and calculation |
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17 |
15.45-16.40 |
Sound absorbing materials, typical products. Example of measurement of Alpha Sabine according to ISO 354 (reverberant room) |
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18 |
23/11/2018 |
13.45-14.40 |
Sound insulating materials, typical products. Frequency dependence of the Sound Reduction Index R, the Mass law, resonances and coincidence. |
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19 |
14.50-15.35 |
Italian law about building acoustics (DPCM 5/12/1997), experimental assessment of compliance |
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20 |
15.45-16.40 |
Italian law about environmental noise (L. 447/1995), acoustical zoning, the new EC standards based on Lden - Results |
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|
16:40-17:30 |
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21 |
30/11/2018 |
13.45-14.40 |
The Single Event Level (SEL) and its usage for evaluation of transportation noise |
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22 |
14.50-15.35 |
Examples and exercises
regarding environmental noise |
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23 |
15.45-16.40 |
Examples and exercises regarding noise at the workplace |
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24 |
7/12/2018 |
13.45-14.40 |
Digital Sound Processing, FIR and IIR filters, FFT, aliasing, windows,
spectrogram |
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25 |
14.50-15.35 |
Fast convolution
by FFT, partitioned convolution, computation of FIR coefficients for inverse
filters, the Kirkeby inversion |
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26 |
15.45-16.40 |
Measurement of the absorption coefficient: reverberant room, standing wave tube, sound intensity method, impulsive method |
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|
16.40-17.30 |
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27 |
14/12/2018 |
13.45-14.40 |
Techniques employed for sound recording and reproduction, mono, stereo, multichannel, 3D, the Soundfield microphone, Ambisonics |
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28 |
14.50-15.35 |
Wave Field Synthesis (WFS), loudspeaker arrays, the Casa del Suono lab in Parma |
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29 |
15.45-16.40 |
Microphone arrays, virtual microphones, the RAI project |
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30 |
21/12/2018 |
15.45-16.40 |
Simulation of sound propagation outdoors employing the DISIA/CITYMAP software package |
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31 |
13.45-14.40 |
Simulation of sound propagation indoors employing the RAMSETE/AURORA software package |
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32 |
14.50-16.40 |
Final exercises, previous exam problems |
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16:40-17:30 |
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(*) Warning: this activity involves very loud sound signals, so it is recommended to carry protective devices (earplugs, etc.) - it is also recommended to bring a recording device (laptop, smartphone, tablet) equipped with software capable of recording uncompressed WAV files.
Copyright (C) Angelo Farina – all the material posted here cannot be
reproduced or broadcasted without authorization.
Last revision: 15 December 2018